HDPE - High Density Poly Ethylene
High Density Poly Ethylene is resistant to many different solvents and has a wide variety of applications in industry based on its strength and lack of reactivity including fuel tanks, piping for water and natural gas, snowboards and bottles.
We do not recommend using HDPE for printing until you have become familiar with your machine printing with either ABS or PLA. HDPE can warp due to thermal stresses on cooling.
HDPE is a fossil fuel derived polymer